Maintenance2751−4/A1
Winterthur Gas & Diesel Ltd.
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8) If the measured values are more than the limits given on the gauge (94292), you
can repair the valve spindle (refer to the data below).
9) If more than 3.0 mm is ground off, do the procedure that follows:
a) Use a build-up welding procedure to repair the valve seating surface.
b) Grind the seating surface of the valve spindle again (see paragraph 2).
3. Corrosion
Corrosion can occur at the bottom of the valve plate when engines operate for long
periods (e.g. in rough weather conditions).
If the corrosion is less than or equal to 6.0 mm (see Fig. 2), the valve spindle can be
repaired.
Note: The repair procedure can only be done in a Wärtsilä Services Switzerland
Ltd or Winterthur Gas & Diesel Ltd. authorized repair workshop.
Valve spindles cannot be repaired when the corrosion is more 9.0 mm, but can
continue to operate until the corrosion has a depth of 13.0 mm.
Exhaust Valve: Grinding the Seating Surface on the Valve Head
2016
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